The redirect only happens when you ID the UserAgent as Opera (In Opera click the F12 button to change the UserAgent).

I’m not sure if MySQL was hacked or if they are just playing a silly joke.

Update #1(12:20 PM): It seems like MySQL fixed this problem/feature/hack.

Update #2(10:07 PM): Here is what the webmaster of the MySQL website had to say about the Microsoft redirect.

It was an accident!

I inadvertently left in some test code that was intended to combat a very badly-behaved robot identifying itself as a Microsoft product. The URL was my private, rather sarcastic comment about MS having unleashed this software on the world — On a whim I had briefly thought of having MS’ robot redirect to microsoft.com. I’m sure a lot of webmasters will know which robot I’m referring to — it can eat up a lot of bandwidth and server resources.

I use Opera, and it was a great tool for testing this problem. After I finished testing, I forgot to remove the test code. That’s why the Opera user agent was redirected. Of course, this was never meant for anyone but me, and I’m very sorry that this happened.

Please rest assured that I would never even dream of hindering access to Opera users, or any other browser. Only bad robots.